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Preparation method of polyethylene glycol (PEG)-modified vegetable oil emulsion mould release agent

A technology of modifying vegetable oil and mold release agent, which is applied in the petroleum industry, lubricating composition, etc., can solve the problems of surface contamination of steel bars and concrete, poor mold release effect, loss of mineral oil, etc., and achieves excellent mold release effect, Excellent peeling performance and small amount of sticky ash

Inactive Publication Date: 2014-08-06
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional mineral oil-based release agents such as engine oil and diesel will pollute the surface of steel bars and concrete, and the release effect is not very good
The use of mineral oil-based release agents causes mineral oil to be lost to the environment, polluting the environment, and engine oil, diesel oil, and mineral oil are all non-renewable resources
As an environmentally friendly release agent, vegetable oil-based release agents have the advantages of being renewable, biodegradable, and harmless to the human body. Defective (dusty mold)

Method used

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  • Preparation method of polyethylene glycol (PEG)-modified vegetable oil emulsion mould release agent
  • Preparation method of polyethylene glycol (PEG)-modified vegetable oil emulsion mould release agent
  • Preparation method of polyethylene glycol (PEG)-modified vegetable oil emulsion mould release agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] 1. One transesterification

[0022] Put 20g of dried rapeseed oil in the reactor, add 5.2g of potassium hydroxide methanol solution with a mass concentration of 6-8% dropwise into the reactor, control the dropping time at about 20min, and keep warm at 60°C after dropping After reacting for 1h, the product was washed to neutrality after the reaction, and rapeseed oil methyl ester was obtained after removing the solvent;

[0023] 2. Secondary transesterification

[0024] Put 15g of rapeseed oil methyl ester and 0.6g of catalyst nano-magnesium oxide in the reactor, add 20g of PEG400 dropwise into the reactor, and keep the temperature at 200°C for 8h after dropping, filter after the reaction, and remove the solvent by rotary evaporation to obtain PEG-canola oil polymer;

[0025] 3. Emulsification

[0026] Add 5 g of PEG-rapeseed oil polymer into the reactor, and slowly add 76 g of deionized aqueous solution of emulsifier OP-10 with a mass concentration of 2% at 40°C (tha...

Embodiment 2

[0031] The preparation method of step 1 and step 2 of this embodiment is the same as that of embodiment 1.

[0032] 3. Emulsification

[0033] Add 10g of PEG-rapeseed oil polymer into the reactor, and slowly add 72g of deionized aqueous solution of emulsifier OP-10 with a mass concentration of 2% at 40°C (that is, emulsified water) into the reactor under high-speed stirring until the emulsion Invert the phase, keep stirring for 30 minutes, continue to slowly add emulsified water, continue stirring for 20 minutes, then add 18 g of distilled water to the reactor, and discharge after stirring for 20 minutes to obtain a PEG modified vegetable oil emulsion release agent with a solid content of 10%.

[0034] The PEG-modified vegetable oil emulsion release agent prepared in this example was subjected to a concrete release experiment according to the concrete industry standard JC / T949-2005, and the experimental results are shown in the table below.

[0035]

[0036] It can be seen...

Embodiment 3

[0038] The preparation method of step 1 and step 2 of this embodiment is the same as that of embodiment 1.

[0039] 3. Emulsification

[0040] Add 15g of PEG-rapeseed oil polymer into the reactor, and slowly add 68g of deionized aqueous solution of emulsifier OP-10 with a mass concentration of 2% at 40°C (that is, emulsified water) into the reactor under high-speed stirring until the emulsion Invert the phase, keep stirring for 30 minutes, continue to slowly add emulsified water, continue stirring for 20 minutes, then add 17 g of distilled water to the reactor, and discharge after stirring for 20 minutes to obtain a PEG modified vegetable oil emulsion release agent with a solid content of 15%.

[0041] The PEG-modified vegetable oil emulsion release agent prepared in this example was subjected to a concrete release experiment according to the concrete industry standard JC / T949-2005, and the experimental results are shown in the table below.

[0042]

[0043] It can be seen...

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Abstract

The invention discloses a preparation method of a polyethylene glycol (PEG)-modified vegetable oil emulsion mould release agent. The preparation method comprises the following steps: first, performing interesterification between vegetable oil serving as a raw material and methanol; then, performing interesterification between the vegetable oil and PEG to obtain a PEG-vegetable oil polymer; and finally, emulsifying the PEG-vegetable oil polymer to obtain the mould release agent. The PEG-modified vegetable oil mould release agent has high stripping performance; the surface of the stripped concrete is smooth and complete, has no defects and low amount of adhered concrete (namely the weight of the concrete adhered to per square mould), does not rust a mould and does not pollute the environment, and is a real environment-friendly mould release agent.

Description

1. Technical field [0001] The invention relates to a preparation method of a release agent, in particular to a preparation method of a PEG modified vegetable oil emulsion release agent, and belongs to the technical field of building materials. 2. Background technology [0002] Concrete release agent, also known as concrete release agent or release lubricant, is a natural or chemical agent that is applied to the inner wall of the formwork to lubricate and isolate, so that the concrete can be removed from the formwork after hardening, and the shape of the concrete can be kept intact. Material. [0003] At present, engine oil, diesel oil, mineral oil, soap liquid, saponified animal and vegetable oil waste, etc. are mainly used as release agents in China. Traditional mineral oil-based release agents such as engine oil and diesel will pollute the surface of steel bars and concrete, and the release effect is not very good. The use of mineral oil-based release agents causes miner...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10M173/00C10M177/00C10N40/36C10N30/16
Inventor 王文平宋跃锋赵鹤翔
Owner HEFEI UNIV OF TECH
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